on v12 the task list you get when you hold the menu button down would take two taps to select the items for the first 10 seconds or so. This is not as it should be and now the options only take a single tap.

also, when the phone was locked and the LCD + backlight is off, opening the phone it used to take a while to reactivate the backlight - the screen rotated quickly, but the backlighting seemed to lag behind. Now when I open the phone, it seems much quicker and the screen is lit almost straight away.